Hoferichter, Martin ; Kubis, Bastian ; Leupold, Stefan ; Niecknig, Franz ; Schneider, Sebastian P. (2014)
Dispersive analysis of the pion transition form factor.
In: The European Physical Journal C, 74 (11)
doi: 10.1140/epjc/s10052-014-3180-0
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
We analyze the pion transition form factor using dispersion theory. We calculate the singly-virtual form factor in the time-like region based on data for the e⁺e⁻→3π cross section, generalizing previous studies on ω,ϕ→3π decays and γπ→ππ scattering, and verify our result by comparing to e⁺e⁻→π⁰γ data. We perform the analytic continuation to the space-like region, predicting the poorly-constrained space-like transition form factor below 1GeV, and extract the slope of the form factor at vanishing momentum transfer aπ=(30.7±0.6)×10⁻³. We derive the dispersive formalism necessary for the extension of these results to the doubly-virtual case, as required for the pion-pole contribution to hadronic light-by-light scattering in the anomalous magnetic moment of the muon.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Hoferichter, Martin ; Kubis, Bastian ; Leupold, Stefan ; Niecknig, Franz ; Schneider, Sebastian P. |
| Art des Eintrags: | Bibliographie |
| Titel: | Dispersive analysis of the pion transition form factor |
| Sprache: | Englisch |
| Publikationsjahr: | 2014 |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | The European Physical Journal C |
| Jahrgang/Volume einer Zeitschrift: | 74 |
| (Heft-)Nummer: | 11 |
| Kollation: | 13 Seiten |
| DOI: | 10.1140/epjc/s10052-014-3180-0 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | We analyze the pion transition form factor using dispersion theory. We calculate the singly-virtual form factor in the time-like region based on data for the e⁺e⁻→3π cross section, generalizing previous studies on ω,ϕ→3π decays and γπ→ππ scattering, and verify our result by comparing to e⁺e⁻→π⁰γ data. We perform the analytic continuation to the space-like region, predicting the poorly-constrained space-like transition form factor below 1GeV, and extract the slope of the form factor at vanishing momentum transfer aπ=(30.7±0.6)×10⁻³. We derive the dispersive formalism necessary for the extension of these results to the doubly-virtual case, as required for the pion-pole contribution to hadronic light-by-light scattering in the anomalous magnetic moment of the muon. |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik |
| Hinterlegungsdatum: | 02 Aug 2024 12:38 |
| Letzte Änderung: | 02 Aug 2024 12:38 |
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Dispersive analysis of the pion transition form factor. (deposited 02 Mär 2022 13:20)
- Dispersive analysis of the pion transition form factor. (deposited 02 Aug 2024 12:38) [Gegenwärtig angezeigt]
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